Patent US2671135A successfully refreshed from Google Patents.
EP0152269A2
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Optical magnetic recording member
Assignee: Ulvac Inc
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Filing: 1985-02-06
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Granted: —
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Expires: 2005-02-06
Abstract
Abstract An optical magnetic recording member comprising a substrate provided thereon with a magnetic layer, characterised in that the magnetic layer is provided, at least on one side surface thereof, with an amorphous material layer comprising any desired one selected from an amorphous Si layer, an amorphous Ge layer and an amorphous GeSi layer.
Inventors
- 👤 Kyuzo Nakamura
- 👤 Yoshifumi Ota
- 👤 Shin Asari
- 👤 Tsutomu Asaka
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-31 01:53
CPC Classifications
G; G11; G11B; G11B5/00; G11B5/62; G11B5/72; G11B11/00; G11B11/10; G11B11/105; G11B11/10582; G11B11/10586; G11B5/73; G11B5/7368; Y; Y10; Y10S; Y10S428/00; Y10S428/90
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
53 words
An optical magnetic recording member comprising a substrate provided thereon with a magnetic layer, characterised in that the magnetic layer is provided, at least on one side surface thereof, with an amorphous material layer comprising any desired one selected from an amorphous Si layer, an amorphous Ge layer and an amorphous GeSi layer.
Claim 2
Dependent Claim
53 words
An optical magnetic recording member comprising a substrate provided thereon with a magnetic layer, characterised in that the magnetic layer is provided, at least on one side surface thereof, with an amorphous material layer comprising any desired one selected from an amorphous Si layer, an amorphous Ge layer and an amorphous GeSi layer.
Claim 3
Dependent Claim
38 words
An optical magnetic recording member as claimed in claim 1, wherein the amorphous material layer is mixed with at least one element selected from H, C, F, N and 0, in an amount of below about 50 at.%.
Claim 4
Dependent Claim
43 words
An optical magnetic recording member as claimed in any of claims 1 and 2, wherein the amorphous material is 3.0 - 3..8 in refractive index and has a predetermined value of transmission coefficient also in relation to a wavelength of a laser beam.
Claim 5
Dependent Claim
31 words
An optical magnetic recording member as claimed in claim 2, or claim 3 when appended to claim 2, wherein the mixing amount of the element is preferably below about 30 at.%.
References Cited (Backward Citations)
No citation records indexed.
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